playstation: Fix get_playstation_info() signature

The 'cancellable' parameter must be explicitly specified on Vala side.
6 jobs for wip/exalm/issue68 in 36 minutes and 51 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #101905
flatpak:app

00:20:55

 
  Test
passed #101906
flatpak:tests

00:12:21

 
  Review
passed #101907
review

00:00:25

passed #101908
manual
stop_review

00:00:20

 
  Cross Distro
passed #101909
fedora:29

00:02:45

passed #101910
ubuntu:devel

00:02:47